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Did another interval with Motul 8100 X-cess, though shorter than last time (5,500 vs 9,000). Iron is still a bit high. Switched from a K&N air filter to OEM paper and silicon dropped by half. I poured Rotella T6 5w40 in there this time (actually just 4 qts of it, along with a qt of GC 0w30...

From a quick search, this appears to be the first UOA from a Ferrari on BITOG, so history is being made! I acquired an '87 Ferrari 328 GTS earlier this year and thought I'd see how the oil is doing (I was going to do it pre-purchase, but didn't have time). The car runs strong and is a blast...

Haven't posted on here for a long time, but recently got a UOA back. This is a 9,000 mile drain interval on Motul 8100 5w40 full-synth -- it's the second change with this oil, which I switched to at the recommendation of my new tuner (I moved to Arizona). I didn't get a sample last time because...

Let me know if this is hard to read. This is a report using GC for 4,000 miles over the winter, so reasonably tame driving. The car is running an upsized turbo (18G), so making about 100hp more than the stock 233hp. This fill was the first after an EngineRX treatment cycle, which you'll also...

This is my first UOA. I did two samples from the same change of Redline 5w40. The first sample was taken after a long run of full-tilt trackday driving, ~200 miles in one day on Pocono South, plus a day of slow, rainy track driving at NHIS, and the only other mileage was basically highway...